Frozen Chalk Paint
Make your own frozen chalk
Materials
Cornstarch
Water
Food coloring or liquid watercolors
Ice cube trays
Directions
Mix one part corn starch with one part water
Add food coloring or liquid watercolors until you reach the desired color
Pour into ice cube molds
Freeze
Pop out at play
Note: This chalk may last longer than regular chalk (think 2-3 weeks instead of days)
adapted from Tinker Lab